“There is no life down there.” For decades it was almost a legend among activists and oceanographers: a giant landfill, with hundreds of thousands of radioactive drums, abandoned in the abyssal plain of the Atlantic. The problem is that there was life and they were killing it. A little less than 300 nautical miles from Cape Fisterra in Galicia – just over 500 kilometers – the Nodssum Project, which is already on its third expedition, has sounded the alarm.
Far from the myth, French scientific missions They located thousands of barrels, went down with manned submarines, photographed leaks and measured radionuclides above what was expected. 220,000 barrels They only found a thousand. The rest, some 100,000 tons of nuclear waste, lay at the bottom and was carried away by the currents, its contents scattered. Now, with just over 3,500 barrels located, it is concluded that they are suffering from an “advanced state of deterioration”, according to researchers from the Center National de la Recherche Scientifique (CNRS).
A cemetery under the Atlantic. Where does all this come from? The drama began in 1946. And until the early 1990s, British, Dutch, Belgian, French and other European ships continuously dumped low- and medium-level radioactive waste at the bottom of the Atlantic. They are concentrated in an area of about 10,000 square kilometers, at a depth of 4,000–5,000 meters. It is, without hot cloths, the third largest landfill of canned nuclear waste known on the planet.
Inside there are no fuel rods, but rather civil and military nuclear waste: sludge, gloves, laboratory equipment, medical remains, resins, contaminated scrap metal, encapsulated in cement or tar to withstand the pressure of the deep ocean. When the landfill began to be mapped, they did not even document 1% of the total. To date, just over 3,000 barrels have been located, identified with the autonomous robot UlyX and high-resolution sonar.
A longliner and a lot coraxe. The They came between two freighters that were dumping garbage to the Atlantic Trench. The press took notice and that practice bounced around in newspapers around the world. The protests had an effect, because the European body in charge of controlling this waste declared a moratorium on discharges. Moratorium that is still in force today.
The first NODSSUM-I campaign focused on making the invisible visible. since a decadethe expedition has been expanding the mapped area to about 140 square kilometers, with densities of about 20 drums per square kilometer and more than 3,350 barrels cataloged. The great novelty came with the manned submarine Nautile, which made it possible to directly observe the state of the barrels at more than 4,000 meters deep. It was then that the real state could be noticed.
Barrels in the last. Corroded surfaces, colonization of anemones, open cracks in dents and leaks of encapsulating material – with tar and cement overflowing – in some containers, in addition to the detection of radionuclides above what was expected. The sea salt is slowly eating away some brass lacking the necessary security.
The expedition has taken 345 samples of sediment, about 5,000 liters of water and specimens of abyssal fauna (fish, amphipods, small crustaceans) to analyze them in the laboratory with precision one hundred times greater than that of the instruments on board. To date, no “anomalies” have been found in the sediments and, although the radionuclides are below legal limitsthey do exceed all previous estimates.
Rescue them… or leave them where they are. The current objective is to contain the threat. Can 200,000 drums be removed from the bottom of the Atlantic? Technically, yes; Politically, economically and in terms of risk, things get complicated. The Nuclear Safety Council insists on a clear message: the Galician and Cantabrian coastal waters do not show significant levels of radioactivity, below the limits set by Spanish and European regulations. And Spain does not even have responsibilities, since it did not dump waste into the Atlantic trench.
In fact, the problem goes beyond the astronomical cost: many barrels are so degraded that they could disintegrate in the lifting process. If deterioration continues, will there be greater problems resulting from bioaccumulation? How does it affect the abyssal food chain? This is exactly what you are looking to answer. At the same time, we are trying to study this deep habitat full of organisms adapted to a darkness that now coexists with an 80-year-old nuclear legacy.
Images | BNG (by Wolcott Henry), Flickr (owned by Tomas Vazquez) and Campagne NODSSUM, CNRS, Flotte oceanographique française.
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